Stroller with telescopic and locking members

ABSTRACT

A stroller for carrying a child or child restraint system, that may comprise an additional storage area or child support system when expanded. The frames include a mechanism whereby the base of the frame is expanded rearward to create a storage space roughly behind the baby seat, and optionally where a top to the storage area folds up from the rear of the frame to complete the storage area. The stroller may include detachable wheels. The stroller may also include handles or push bars that may optionally include mechanisms to assist in expanding or contracting the storage area. The stroller may also be constructed so as to be collapsible for storage.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of U.S. patent applicationSer. No. 14/194,712, filed Mar. 1, 2014, which is a continuation-in-partof, claims the benefit of and priority from U.S. patent application Ser.No. 14/069,169, filed Oct. 31, 2013 and provisional patent applicationSer. No. 61/720,605, entitled Stroller with Expandable Cargo Area, filedOct. 31, 2012, the disclosures of which are incorporated herein byreference.

FIELD OF INVENTION

The present invention relates to baby strollers, and more particularlybaby strollers which can be expanded or configured in such a way as toprovide additional storage capabilities.

BRIEF DESCRIPTION OF THE INVENTION

The present invention relates to a baby stroller with enhancedcapabilities for storage and/or multi-child configurations. The strollerin the present invention is capable of expanding from the rear, therebycreating a cargo space, and, thus, providing the ability tosimultaneously transport a passenger such as a child, multiple children,as well as additional cargo, with or without passengers, using simpleactuation mechanisms.

SUMMARY

Broadly, the present invention provides for a stroller for carrying auser, having a front frame member for supporting a seat. In oneembodiment, there is a foldable rear member which folds down to createan additional base member. The foldable rear member can be actuated viaa mechanism located at or near the rear frame, the nexus of the rearframe and base member, or the handle. In an alternative embodiment,there is a rear member which can expand by means of telescopically orslide-wise actuating a handle. In a third embodiment, there is anadditional support member coupled between the front and rear framemember which expands to form an additional support when the base isexpanded. In many embodiments, this cargo area is designed forflexibility, so that its size may be adjusted. Further, in someembodiments, the extendable cargo area includes additional seatingcapacity for one or more additional children.

BACKGROUND

Baby strollers have been known and used for a number of years to providea comfortable device to move a baby or small child. The trend with babystrollers has been to reduce the size of the stroller, thus allowing itto be stored more easily. However, with the reduction of size has comethe reduction of space that the strollers provide for carryingadditional cargo, or multiple children. There remains the need for ababy stroller that can accommodate a large volume of goods and/or asecondary child, while still folding to a compact state.

U.S. Pat. No. 4,878,680 describes a convertible car seat and strollercombination apparatus comprising a padded child's seat having atelescopic U-shaped handle extending upward from behind the back of theseat, and a perimeter frame having four wheels extendible downward. Theapparatus is distinguishable from the present invention at least inbeing limited to one occupant and requiring a perimeter frame for thewheels, as well as lacking an extendable cargo area.

U.S. Pat. No. 4,896,894 describes a stroller car seat apparatuscomprising a conventional infant seat having a safety harness, aU-shaped padded front guard bar, a U-shaped telescoping handle in therear, a pivoting front footrest, and a folding rectangular scissorsframework with four wheels. The apparatus is distinguishable from thepresent invention at least in being limited to one child, requiring anobtrusive lower framework, and lacking an extendable cargo area. [0010]U.S. Pat. No. 5,360,221 describes a baby carriage convertible to asafety car seat with a harness comprising a body assembly including aseat, a back, a footrest, and side plates. A wheel assembly is pivotallymounted on the body assembly and adapted to be folded back. A handleassembly is pivotally mounted on the body assembly and adapted to berotated into a horizontal position. A locking assembly locks andreleases the wheel assembly. When the carriage is converted into asafety seat, the wheel assembly is released and folded back, and thehandle assembly is rotated into a horizontal position to be used as anarm rest plate. The apparatus is distinguishable from the presentinvention at least in being limited to one child, requiring the rotationof the handle assembly to serve as an arm rest, and lacking anextendable cargo area.

U.S. Pat. No. 5,478,096 Chien Ting describes a collapsible multi-usebaby carriage having a structure transformable into a dining chair, asafety seat in a car, a cradle, and a bed comprising a seat, a backrestpivotally connected with the seat to change the angle of the backrest, aU-shaped hand rest pivotally connected with the backrest. The structurehas a pushing handle, two opposite telescopic side tubes with a windablesupport plate between the side tubes, and a winding tubular shaft housedin a front tube of the hand rest for pulling out for supporting food.Two front and rear casters are pivotally connected with the bottom ofthe seat and foldable to the seat bottom. The carriage isdistinguishable from the present invention at least in being limited toone child, requiring a windable support plate and two opposite sidetubes, and lacking an extendable cargo area.

U.S. Pat. Nos. 6,523,840, 6,669,212 B2 and 6,523,840 B1 (relatedpatents) describe a combined shopping cart stroller, with a frame thatincludes a primarily horizontal lower frame portion having a forward endand a rearward end; a curved upper frame portion; vertical supportextending between the lower frame portion and upper frame portion; aseat mounted to the frame; and a primary cargo area, which is defined asthe space generally bounded by the lower frame portion and the upperframe portion rearward of the seating area. The shopping cart strolleris distinguished from the present invention at least in the front framenot extending to a point above the rearward frame when the cargo spaceis engaged, the manner in which the primary cargo space extends, as wellas the fact that the primary cargo space is unable to support the weightof an additional child.

U.S. Pat. No. 7,188,858 B2 describes a collapsible stroller, with aframe having left and right sides, each side comprising: an elongatedbottom member; a front leg; a push arm; and a support strut, wherein thefront leg, the push arm, and the support strut pivot relative to eachother when the stroller moves between the open position and the foldedposition. The stroller is distinguishable from the current invention atleast in being limited to one child, and not having an extendable rearcargo space.

U.K. Patent Application No. GB 2 262 914 A published on Jul. 7, 1993,describes a molded child seat for a vehicle and convertible into apushchair comprising a supporting frame having two triangular lateralsub-frames interconnected by cross rails. Each sub-frame is equippedwith a pair of mounting pins adapted to engage with appropriately shapedand positioned slots on the wheeled pushchair frame. The apparatus isdistinguishable from the present invention at least in being limited toone child, requiring a separate supporting frame, and lacking anextendable cargo area.

U.S. Pat. No. 5,544,904 discloses a convertible stroller and shoppingcart having a stroller portion and a shopping cart portion. The strollerportion includes a seat secured to a metal frame, and the shopping cartportion comprises a collapsible receptacle. The receptacle can beoriented in two orientations, a stowed orientation adjacent the seat anda deployed orientation over the seat. When the receptacle is deployed,it conforms to the seat, creating a shopping cart from the stroller. Theconvertible stroller is distinguishable from the present invention atleast in lacking the capacity to carry a second child, and in the factthat the extendable cargo area extends to occupy the same volume as thechild seat when extended.

U.S. Pat. No. 6,669,212 discloses a cart having a frame member includingupright and lateral frame portions. A platform is attached to thelateral frame portion and a stationary seat assembly is secured to theupright frame portion. The stationary seat assembly includes a rearwardfacing stationary seat, a handle and a safety bar between the seat andthe handle. A pivoting mechanism is mounted to the lateral frame portionremote from the upright frame portion. The pivoting mechanism ismoveable between a substantially upright position and a retractedposition and is located relative to a back portion of the seat. Aflexible receptacle is attached to the pivoting mechanism, and movesbetween an open and collapsed position when the pivoting mechanism ismoved between the substantially upright and the retracted position,respectively. The stationary seat and the platform are accessible whenthe pivoting mechanism is in the substantially upright position or theretracted position. The cart is distinguishable from the presentinvention at least in that the present invention is fully collapsible,can accommodate a second child, and in having an extendable cargo areawhich includes an extendable base component.

U.S. Pat. Nos. 6,378,891 and 6,170,854 disclose a convertible strollerand shopping vehicle having a stroller portion and a shopping vehicleportion. The stroller portion includes a seat which is movable from adeployed position to a stowed position. In the deployed position, theinvention is used as a stroller. The shopping vehicle portion includes acollapsible receptacle that can be oriented in one of two orientations.In an open orientation, the receptacle creates a shopping cart while ina collapsed orientation the invention can be used to transport bulkmaterials. The convertible stroller is distinguishable from the presentinvention at least by lacking the capacity to carry a second child, andin the fact that the extendable cargo area extends to occupy the samevolume as the child seat when extended.

U.S. Pat. No. 8,070,180 (which has the same inventor as the presentinvention) discloses a stroller for carrying a user, and having anexpandable storage space located between the child seat and the rearmostframe members. This may include a first and second front frame memberfor supporting a seat or seats and back support member, a first andsecond back frame member being connected to the first and second frontframe member, an expandable base member, which connects between thefirst and second front frame member and the first and second back framemember. The expandable frame member may move between an extended and aretracted position to provide a storage area. This invention discloses astroller with an expandable storage space, however, the volume of thestorage space is not adjustable, he invention does not providemechanisms for actuating the deployment of the extendable cargo area,the invention does not provide a rear handle lock to take the load ofadditional cargo, the invention does not provide a solution for foldingthe front seat compactly and independently of the rear frame, theinvention does not provide methods for compactly folding the upperexpandable basket, and the invention does not provide for additionalseating configurations within the expandable storage space.

U.S. Pat. No. 6,676,140 B1 discloses a two-seat collapsible strollercomprising a telescopically collapsing rear section that roughly slidesinto the front section such that the seat nests onto the front seat inthe collapsed position. This stroller differs from the present inventionat least in that the second seat is a mandatory part of the invention,and no extendable cargo area exists.

U.S. Pat. No. 8,366,141 discloses a stroller with a collapsible seat fora second child, comprising a complex coupling mechanism that enables thecollapse and expansion mechanism. It is distinguishable from the presentinvention at least in that the stroller's collapse mechanism for thesecond seat is substantially more complex than in the present invention,and in that it does not provide for the option of an extendable cargoarea.

In general, the prior art contains a series of weaknesses which thepresent invention addresses. First, most prior art lacks the capacity toform an extendable cargo area while simultaneously carrying even asingle child: the cargo area extends into the area where the child wouldsit. Second, those few inventions designed to include a second childboth lack the flexibility to also include extendable storage, andinclude complex or inflexible deployment mechanisms which prevent thestrollers from being deployed easily and/or folded into compact form.The present invention, as will be shown, is capable of simultaneouslycarrying a child and having the cargo area extended/deployed in a waythat can handle heavy loads, is easily expanded via actuationmechanisms, is of such a nature that it can also function as additionalseating space for additional children. Finally, the present invention isdesigned to be easily folded into a compact state for travel or storage.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention may be understood by reference to the followingdescription taken in conjunction with the accompanying drawings, inwhich, like reference numerals identify like elements, and in which:

FIG. 1 illustrates a side elevational view of the preferred embodimentof the stroller in a retracted position;

FIG. 2 illustrates a side elevational view of the preferred embodimentof the stroller with the rear member expanded;

FIG. 3a . illustrates a side elevational view of an alternativeembodiment of the stroller, in which the rear member is not expanded,and in which a cable, being connected to an extendable handle andextendable base member, runs through the frame, so that a user canengage the rear extendable member by actuating the handle;

FIG. 3b . illustrates a side elevational view of an alternativeembodiment of the stroller, in which the rear member is in the processof being expanded;

FIG. 3c . illustrates a side elevational view of an alternativeembodiment of the stroller in which the rear member is shown beingfurther expanded;

FIG. 3d . illustrates a side elevational view of an alternativeembodiment of the stroller in which the rear member is shown fullyexpanded;

FIG. 4 illustrates a side elevational view of an alternative embodimentof the stroller, in which the rear member is not expanded, in which anexpandable frame member is engaged via sliding support members and jointmembers;

FIG. 5 illustrates a rear perspective view of an alternative embodimentof the stroller as illustrated in FIG. 11, in which the rear member isnot expanded;

FIG. 6 illustrates a side elevational view of an alternative embodimentof the stroller as illustrated in FIG. 11, in which the rear member isin the process of being expanded;

FIG. 7 illustrates a rear perspective view of an alternative embodimentof the stroller as illustrated in FIG. 11, in which the rear member isin the process of being expanded;

FIG. 8 illustrates a side elevational view of an alternative embodimentof the stroller as illustrated in FIG. 11, in which the rear member isfully expanded;

FIG. 9 illustrates a rear perspective view of an alternative embodimentof the stroller as illustrated in FIG. 11, in which the rear member isfully expanded;

FIG. 10 illustrates a side elevational view of an alternative embodimentof the stroller as illustrated in FIG. 11, where the stroller is in afolded position;

FIG. 11 illustrates a rear perspective view of an alternative embodimentof the stroller as illustrated in FIG. 11, where the stroller is in afolded position.

FIG. 12 illustrates an alternative embodiment of the stroller havingselectively foldable front frame members.

FIG. 13 illustrates an alternative embodiment of the stroller having arear child seat.

FIG. 14 illustrates a specific alternative embodiment of a basket forthe stroller.

FIG. 15A illustrates a specific exemplary embodiment of a rear handlelock of the stroller.

FIG. 15B illustrates the lock of FIG. 15A assembled.

FIG. 15C illustrates the lock of FIG. 15B in an exploded view.

FIG. 16 is a diagrammatic illustration side view of a stroller of thepresent disclosure in a retracted position and an expanded position.

FIG. 17 provides various views of the telescopic members of a strollerof the present disclosure.

FIG. 18 is a diagrammatic illustration perspective view of a detail ofthe stroller of FIG. 1.

FIG. 19 is a diagrammatic illustration perspective view of a detail ofthe detail of FIG. 3.

FIG. 20 is a diagrammatic illustration perspective view of a detail ofthe male and female telescoping members of a stroller of the presentdisclosure.

FIG. 21 is a diagrammatic illustration transparent view of a detail ofthe male and female telescoping members of a stroller of the presentdisclosure.

FIG. 22 is a diagrammatic illustration side view and detail of astroller telescoping member locking mechanism of the present disclosure.

FIG. 23 is a diagrammatic illustration side view of a stroller of thepresent disclosure with the base in a retracted position, intermediateposition, and an expanded position.

FIG. 24 is a diagrammatic illustration side view of a stroller of thepresent disclosure with the handle members in a retracted position andan expanded position.

FIG. 25 is a perspective view schematic illustration of telescopicmember locking mechanism of the present disclosure.

FIG. 26 is a perspective view schematic illustration of a femaletelescopic member for a locking mechanism of the present disclosure.

FIG. 27 is a front view schematic illustration of a male telescopingmember for a locking mechanism of the present disclosure.

FIG. 28 is a perspective view schematic illustration of stroller frameportion with lockable telescoping members of the present disclosure.

FIG. 29 is a side view schematic illustration of a telescopic tubeassembly of the present disclosure.

DETAILED DESCRIPTION

The following description of the preferred embodiment or embodiments isnot intended to limit the scope of the invention to the precise form orforms disclosed, but instead is intended to be illustrative of theprinciples of the invention so that others skilled in the art may followits teachings.

FIG. 1 illustrates a stroller 100 in accordance with the teachings ofthe present invention without the rear member engaged, shown at a sideelevational view. FIG. 1 illustrates a base main frame member 101roughly parallel to the ground, a diagonal main frame member 102, and arear main frame member 103 roughly perpendicular to the ground. The mainframe section of the present invention, comprised of members 101, 102,and 103 is comprised of two mirror sides, connected by cross members.The bottom end, or a section substantially near the bottom end of framemember 103 is connected to frame member 101 at or substantially near therear end of frame member 101. In the present embodiment, frame members101 and 103 are connected at or substantially at a right angle, so thatframe member 101 is parallel or substantially parallel to the ground,and frame member 103 is vertical or substantially vertical. In someembodiments, the angle at which frame members 101 and 103 are connectedmay be substantially acute or obtuse. In some embodiments, frame member103 may attach near the middle or front of member 101. In somealternative embodiments, frame member 103 may be located generallymidway along member 101. In some alternative embodiments, frame member103 may be located near the nexus of member 101 and 104. In somealternative embodiments, frame member 103 may not be present.

FIG. 1 further illustrates frame member 102, which connects to framemembers 101 and 103 to complete the main frame section. FIG. 1illustrates that the top, or a section substantially near the top, offrame member 102 is connected at or substantially near the top of framemember 103, and the bottom, or a section substantially near the bottom,of frame member 102 is connected at or substantially near the front offrame member 101. In some alternative embodiments, frame member 103 maybe joined to frame member 102 at alternative locations, such as nearerto the middle or front of frame member 102. One skilled in the art willrecognize that the location of the connections between members 102 and103, and 101 and 103 will largely determine the angle of 103.

In the present invention, members 101, 102, and 103 are made out of asingle piece of material. In alternative embodiments, member 101, 102,and 103 may be composed of two or more separate components, so as tochange the angle of the handle of the stroller, and to enable folding(see FIGS. 5a-d , 6, 12, and 13). The means with which frame members101, 102, and 103 are connected can be by screws, brackets, welds,rivets or any other suitably strong means. Additionally, frame members101, 102, and 103 may be made of metal, plastic, or any other suitablystrong material. In alternative embodiments, there may be handlesconnected at or near the junctions of frame members 102 and 103, or atthe top-rearmost end of member 102. Furthermore, the handle may serve asa cross-member, linking the mirrored frames of the invention.

FIG. 1 illustrates that the wheel members 105 are attached at or aroundthe junctions of frame members 101 and 102, and 101 and 103. In thepresent embodiment, wheel members 105 can rotate freely 360 degreesalong the axis (as, e.g., swivel wheels). In alternative embodiments,the wheels can have other degrees of rotational freedom. FIG. 1illustrates seat member 104, which is attached to frame member 102. Seatmember 104 may be made from a flexible material, for example fabric ordurable plastic cloth. Alternatively, seat member 104 may be made from aharder material, for example solid plastic, metal, or any other suitablematerial, and may or may not be covered with a padding material forchild comfort. The present invention shows seat member 104 containing acanopy, in order to protect a child from sun, rain, or any otherweather. In a preferred embodiment, this canopy is retractable, allowingthe child to enjoy pleasant weather. In alternative embodiments, thiscanopy may be fixed in a way so that it cannot be retracted, or it maybe absent altogether. In alternative embodiments, seat member 104 may bereplaced by at least one seat attachment device, in which alternate seatconfigurations such as modular seats, car seats, carry cots or alternatechild restraint systems may be mounted to the seat attachment device andor frame support members.

FIG. 1 additionally illustrates a foldable base member 106, which foldsand/or pivots out to form a rear base member. FIG. 1 shows this rearmember in a retracted position, so that the rear member is not engaged.FIG. 1 illustrates member 106 attached to the main frame section at orsubstantially near the nexus of main frame members 101 and 103. Inalternative embodiments, member 106 may be attached to member 101, orthe wheel/wheel assembly of member 105. In the current embodiment,member 106 is deployed via actuator 150, which engages cable 120 torelease pin 141. In alternate embodiments, the location of actuators andlocking devices or cables may be at any point along the frame or wheelmembers. In alternate embodiments, actuators may be levers, buttons, orany other suitable device for deploying member 106. When folded up,member 106 may sit substantially vertical, and flush up against framemember 103, and when folded down, member 106 may sit substantiallyparallel to the ground, aligned to be roughly parallel with frame member101. In alternative embodiments, stowed, member 106 may sit parallel tomember 101, or at any suitable position between members 101 and 103.Member 106 can be constructed of metal, plastic or any other suitablystrong material so as to support the weight of a child and/or anyadditional items carried in the cargo area when the stroller isconfigured as such. The present invention shows member 106 as being asingle piece of material. In alternative embodiments, member 106 may becomprised of multiple parts, so as to be telescopic (retracting andextending), slideable, or otherwise shortenable so as to be lessnoticeable when folded up. Additionally, member 106 may be made so as tobe completely detachable. In some embodiments, member 106 may beattached via a quick-release mechanism.

FIG. 1 illustrates a wheel member 107, which is attached at orsubstantially near the top of member 106 (when member 106 is foldedvertically), so that when folded down, the base of the rear cargosection is more stable because of the support provided by wheel 107. Inalternate embodiments, wheel member 107 may not be attached to member106, if member 106 is of a length that does not require additionalsupport. The wheel member 107 can comprise one or a plurality of wheels.In the present embodiment, wheel member 107 can only rotate at a limitedangle along the axis (e.g., a limited-movement swivel). In alternativeembodiments, the wheel or wheels can have other degrees of rotationalfreedom.

FIG. 1 illustrates handle member 109, which is pivotably affixed toframe member 102. In alternative embodiments, member 109 may be attachedto, or be an integral part of a telescopic expansion of mirrored framemembers 102 (as in FIG. 5). In some embodiments, handle 109 may beattached to mirrored frame members 103, or may be attached to, or be anintegral part of a telescopic expansion of mirrored frame members 103.The range of motion at which member 109 can pivot is not limited toparticular angles with respect to member (103) 102. Additionally, inalternative embodiments, member 109 may be connected to a differentmember of the main frame section, as long as its primary functionalityof providing a comfortable pushing and steering mechanism for the deviceis maintained Member 109 can be made out of metal, plastic, or any othersimilarly suitable material. In alternative embodiments, the handle 109can be shaped differently; with its design not being limited to anyparticular curved or straight shapes, and in alternative embodiments maybe designed as two separate left and right handles (hence not linkingmirrored frame members). This handle 109 can be made out of plastic,metal, or some other suitable material, and may additionally be wrappedin foam, rubber, fabric, or some other padding material.

FIG. 2 illustrates a stroller 100 in accordance with the teachings ofthe present invention with the rear member in the deployed state. Theembodiment shown is similar to that shown in FIG. 1, but with the rearmember folded down along its joint with the structural frame so as to beroughly parallel to the ground and member 101. FIG. 2 additionally showsthe position of wheel member 107 when member 106 is folded down-thewheel is now in contact with the ground so as to provide support formember 106. Additionally, FIG. 2 illustrates how handle 109 can beconstructed to telescopically expand as a means to lengthen the handle.In the illustrated embodiment, the telescopic expansion of handle 109actuates the deployment of rear member 106 by pulling cable 120 whichengages pulley 121 to release pin 141. In other embodiments, theplacement of pin 141 can be located at any location in which release ofmember 106 or wheel member 107 can occur. In other embodiments, pin 141may be a lock, clamp, or other retaining mechanism to allow member 106to move from a stowed to a deployed state (See FIGS. 5A-d for moredetail). In alternative embodiments, a lever or button actuationmechanism can release the pin, lock, clamp, or other retaining mechanismholding member 106, thus allowing it to deploy. In other embodiments,the cable and/or pulley mechanisms may run through or along other framemembers, or any combination of frame members which result in deploymentof member 106. The lever or button to release member 106 can be locatedat many locations along stroller 100, and may be actuated by hand, byfoot, or a combination of the two.

FIG. 3a illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view with the rearbase member not engaged, and with alternative embodiments in some of themembers. FIG. 3a . illustrates base main frame member 101, expandablebase main frame member 101 b, front frame members 102 and 102 a, andrear main frame member 103. The main frame section of the presentinvention is comprised of mirrored structural frames connected by crossmembers, each mirrored structural frame comprising members 101, 101 b,102, 102 a, and 103.

FIG. 3a . illustrates the base of the stroller 100 as being comprised offrame members 101 and 101 b, and as being substantially parallel withthe ground. FIG. 5a . illustrates frame member 101 as forming thefrontward section of the extendable base frame member, and 101 b asforming the rearward section of the extendable base frame member.Members 101 and 101 b are designed to form an expanding base. This isaccomplished by having parts 101 and 101 b move parallel relative to oneanother. In some embodiments, this may be done by having the twocomponents slide (as, e.g., on rails) parallel to each other. In otherembodiments, one component may telescope within another. In otherembodiments still, one component or another may be made ofsub-components which allow the part itself to telescope within itself.Specifically, FIG. 5a . illustrates frame member 101 fitting insideextendable frame member 101 b. In an alternative embodiment, member 101b can fit inside member 101; in yet another alternative embodiment,member 101 b itself may be composed of multiple, telescoping components.In yet another embodiment, member 101 may have rails on which 101 bmoves. In still other embodiments, 101 b may have rails along which 101moves. In a further embodiment, members 101 and 101B slide along eachother for extension and retraction. The means with which members 101 and101 b are connected can be by screws, brackets, welds, pins, rails,slots, slides, or any other suitably strong means. Members 101 and 101 bcan be made out of metal, plastic, or any other similarly suitablystrong material. The bottom end, or a section substantially near thebottom end, of frame member 103 is connected to the extendable framemember 101.

In the present embodiment, frame members 101 and 103 are connected at asubstantially acute angle in relation to the front of the frame, so thatframe member 103 is leaning substantially towards the front of thestroller (see FIG. 5a .). In alternative embodiments, the angle at whichframe members 101 and 103 are connected may be substantially more acute,obtuse, or may form a substantially right angle, with relation to thefront of the stroller. The means with which frame members 101 and 103are connected can be by screws, brackets, welds, pins, or any othersuitably strong means. In alternative embodiments, the lower end ofmember 103 may be attached to extendable member 101 b. In preferredversions of this embodiment, member 103 is slidably attached toextendable member 101 b, so that the movement of member 101 b does notsubstantially alter the angle at which 103 is attached. Member 103 canbe made out of metal, plastic, or any other similarly strong material.

FIG. 3a . illustrates frame member 102, with the bottom end, or asection substantially near the bottom end, of member 102 connecting tothe front, or a section substantially near the front, of base framemember 101. In the present embodiment, members 101 and 102 are connectedat a substantially acute angle in relation to the front of the frame, sothat frame member 102 is leaning substantially towards the rear of thestroller (see FIG. 5a ). In alternative embodiments, the angle at whichframe members 101 and 102 are connected may be substantially moreobtuse, acute, or may form a substantially right angle, with relation tothe front of the frame of the stroller, so long as it still forms asturdy frame to support the potential load on the stroller.Additionally, member 102 can be made out of metal, plastic, or any othersimilarly strong material.

FIG. 3a . illustrates frame member 102 a, with the front of member 102 aconnecting to the top of frame member 102, with the top of member 103connected to 102 a at about the middle of 102 a's length, thuscompleting the main frame section. In alternate embodiments, the nexuspoint at which frame members connect can be at any optimal geometricposition. The means with which frame member 102 a connects to framemembers 102 and 103 can be by screws, brackets, welds, pins, pivots,slides, or any other suitably strong means. Additionally, member 102 acan be made out of metal, plastic, or any other similarly strongmaterial.

FIG. 3a . illustrates that wheel members 105 are attached at or aroundthe junctions of frame members 101 and 102, and near the end of 101 b.In alternate embodiments, front wheel placement can be orientedindependently to either member 101, 101 b or 102 respectively. The rearwheels 105 extend along with member 101 b, as it extends to form therear base member. In the present embodiment, wheel members 105 canrotate freely 360 degrees along the axis, as on, e.g., a swivel. Inalternative embodiments, the wheels can have other degrees of rotationalfreedom.

FIG. 3a . illustrates extendable handle member 102 b, cable member 120,cable connection point 121(a and b), and pulley members 122, which, inaddition to extendable base member 101 b, comprise the means with whichthe rear base member is extended. Handle member 102 b moves parallel tomember 102 a. In a preferred embodiment, this sliding motion isaccomplished by making handle member 102 b fit telescopically within 102a. In alternative embodiments, 102 b slides next to 102 a, as thoughwith rails, slots, slides, or other guides, or may fit inside of 102 b.In yet other embodiments, handle member 102 b comprises multiple piecesand telescopes within itself to contract and extend. Cable connectionpoint 121 a is attached at a point along the length of handle member 102b, and cable connection point 121 b is attached at a point along thelength of 101 b. FIG. 5a . additionally illustrates cable member 120,which is the primary mechanism through which the rear base member isengaged and disengaged. Cable member 120 is threaded through oralongside frame members 101 b, 103, 102 a and 102 b, and is additionallythreaded through pulley members 122 in order to connect connectionpoints 121. FIG. 5a . illustrates pulley members 122 as being locatednear the junctions of members 103 and 102 a, and members 103 and 101 b,respectively. Cable member 120 can be made out of metal or some othersimilarly strong material. The pulley members 122 assist cable member120 to move smoothly within the frame of the stroller 100. Inalternative embodiments, pulley members 122 may be located at differentpoints within the frame of the stroller, or may be some similarlysuitable device for assisting cable member 120 to move smoothly withinthe frame of the stroller. Pulley members 122 can be made out ofplastic, metal, or any other suitably strong material.

FIG. 3a . illustrates extendable handle member 102 b in a substantiallyretracted position. When member 102 b is in a retracted position, therear cargo area is not engaged; when member 102 b is extended by theuser, member 101 b extends via cable member 120, connection pointmembers 121 and pulley members 122, thus extending the rear base member101 b. Additionally, when fully extended, handle 102 b and member 101 bselectively lock into place, so that the rear base member 101 b andhandle 102 b are selectively secured to stroller 100. Attached to theend of handle member 102 b is handle 119. Handle 119 can be have avariety of possible shapes; with its design not being limited to anyparticular curved or straight shapes, and in alternative embodiments maybe designed as two separate left and right handles, attached to mirroredmembers 102 b. This handle 119 can be made out of plastic, metal, or anyother suitable material, and may additionally be wrapped in foam,rubber, fabric, or any other suitable padding material.

In the present embodiment, members 102 b and 101 b are extended manuallyvia cable member 120, in alternative embodiments, some other mechanicaldevice may be used to automatically extend members 102 b and 101 b. Inyet other alternative embodiments, springs or some other similarlysuitable means to store and release potential energy may be attached tomember 102 b or member 101 b to assist the user in engaging the rearbase member.

FIG. 3b . illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view, with members102 b and 101 b beginning to be extended to form the rear base member.

FIG. 3c . illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view, with members102 b and 101 b being extended further, so that the rear base member isalmost fully engaged.

FIG. 3d . illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view, with members102 b and 101 b in a fully extended and locked position, so that therear base member is fully engaged.

FIG. 4 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view, with the rearbase member 101 b not engaged, with alternative embodiments in some ofthe members. Importantly. the stroller 100 illustrated in FIG. 4 has afolding capability (see FIGS. 10-11). The stroller 100 is folded viajoint locking member 130, and 128 a, and 128 b. Release of locking joint130 allows member 103 to fold forward (see FIG. 10-11). Release of jointmember 128 a, allows members 102 and 102 c to fold downward (see FIGS.12-13). In alternative embodiments, this folding capability may not bepresent. Frame member 103, seat member 104, and wheel members 105 arefunctionally identical to those illustrated in FIGS. 1-2 and seat member104 is mounted to members 102. Additionally, front frame base members101 and 101 b are functionally identical to those illustrated in FIGS.3a-d . FIG. 4 illustrates diagonal frame member 102, the top of which isconnected to a joint member 128 b (see FIG. 6), and the bottom, or asection substantially near the bottom, of member 102 being connected tojoint member 128 a. FIG. 4 also illustrates diagonal frame member 102 c,the top of which is connected to joint member 128 a, and the bottom, ora section substantially near the bottom, of member 102 c is connected tomember 101. Joint member 128 a allows frame members 102 and 102 c tomove from an unfolded position (see FIG. 6) to a folded position (seeFIGS. 10-11). Joint members 128 a and 128 b can be made out of plastic,metal, or any other suitably strong material. FIG. 4 introduces diagonalsupport frame member 123. The top of diagonal support frame member 123is connected with a slide somewhere along frame member 102, in such away as to allow it to slide along member 102; the bottom of member 123is connected at, or substantially near, the rear end of base framemember 101. In alternative embodiments, the points at which member 123attaches to members 102 and 101 may be different, so long as member 123is still able to provide structural support for the main frame of thestroller and to slide during folding. In yet another embodiment, the topof member 123 may be attached to member 102 c, instead of member 102.The means with which member 123 attaches to members 102 (or 102 c) and101 can be by slots, screws, clamps, brackets, pins, slides or any othersimilarly suitable means. Additionally, member 123 can be made out ofmetal, plastic, or any other suitably strong material. FIG. 4additionally illustrates footrest member 104 a, which is attached nearor substantially near the front end of base frame member 101. Inalternative embodiments, member 104 a may be placed at a differentlocation on the frame of the stroller, or may be connected to seatmember 104. Additionally, member 104 a can be made out of plastic,metal, or any other similarly suitable material, and may additionally bewrapped in foam, rubber, fabric, or some other padding material.

FIG. 5 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a rear perspective view. FIG. 5illustrates cross members 115 and 128; FIG. 5 additionally illustratesextendable support member 125. In the current embodiment, member 125 isa three-sided, u-shaped tube. In alternate embodiments, 125 may beparallel tubes connected between the frame members 102 (through joint128 b) and 103 without a third tube cross-member. In this embodiment,extendable support member 125 and expandable base frame member 101 b arethe primary means with which the rear cargo area is engaged (see FIG.8). In the un-engaged position, the top, or a portion substantially nearthe top, of extendable bar member 125 is connected to joint member 128b; the bottom, or a portion substantially near the bottom, of member 125is connected to frame member 103 in such a way as to allow it to slidevertically along member 103 and to pivot about that same point. Member125 is able to move from a closed, substantially vertical, position, toan open, substantially horizontal, position by sliding the base of the ushape vertically along member 103. As member 125 is lifted along member103, it is pushed to a substantially horizontal position (see FIG. 10)via joint members 128 b. This creates a new distance between 102 and103, which simultaneously causes base member 101 b to move parallel to101 to extend the base of the frame (see FIGS. 6 and 7). whichsimultaneously expands member 101 b, and thus engages the rear cargoarea. In alternative embodiments, there may be springs, pulleys, motors,or some other mechanism which assists the user of the stroller 100 toexpand members 125 and 101 b. In alternate embodiments, member 125 mayhave additional expansion capabilities beyond pivoting upward, such asexpanding telescopically while also pivoting into an expanded position,or expanding via hinges. When member 125 is in a closed position, itlocks into position. The means with which member 125 locks into placecan be by pin, snap, strap, slot, clamp or any other similarly suitablemethod. Additionally, member 125 can lock into place at variousintervals along the height of 103, to provide for variable expansion.The means with which member 125 locks into place can be by pin, snap,strap, slot, clamp or any other similarly suitable method. Supportmember 125 can be made out of metal, plastic, or any other similarlystrong material.

FIG. 6 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view, with members125 and 101 b in the process of being extended to form the rear cargoarea. As discussed above, in some embodiments, member 125 may lock in anintermediate position along the height of 103, thus achieving variableexpansion of the base. In another embodiment, the total movement ofmember 125 may be limited to an intermediate position, with member 125serving as side frame members once the extendable base has selectivelyexpanded.

FIG. 7 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a rear perspective view, with members125 and 101 b being extended to form the rear cargo area.

FIG. 8 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view with the rearcargo area fully extended. FIG. 8 additionally illustrates basket member127, the top of which attaches to member 125, the front of whichattaches to member 128, and the back of which attaches to member 103. Inalternate embodiments, basket member 127 may attach at or near any framemember, joint, pivot or hub in which attachment renders the basket to ausable state. Member 127 can be made out of fabric or some othersimilarly soft material, or may additionally be made out of plastic orsome other similarly rigid material. Member 127 attaches to the frame ofthe stroller by snaps, straps, or any other similarly suitable means ofattachment.

FIG. 9 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a rear perspective view, with the rearcargo area fully engaged.

FIG. 10 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a side elevational view in a foldedposition. The stroller is folded by releasing joint members 130 via arelease mechanism, which allows frame member 103 to fold forward to asubstantially horizontal position. Additionally, joint members 128 a and128 b allows frame members 102 and 102 c to fold downward, thus allowingmember 103 to fold fully forward. The mechanism with which joint members130 are released can be a button, spring, latch, or any other similarlysuitable method.

FIG. 11 illustrates a stroller 100 in accordance with the teachings ofthe present invention, shown at a rear perspective view in a foldedposition.

In addition to the foregoing embodiments, the present inventioncontemplates other specific exemplary alternative embodiments. Forexample, FIG. 12 illustrates a specific alternative embodiment of astroller 100 that provides selectively foldable front frame members102/102C in which the members are rotatably jointed to create a topportion 102 and a bottom portion 102C of each front member. An actuator,such as a cable arrangement connected to the rotatable joint of eachfront member, effects folding of the front members upon actuation.Specific exemplary embodiments further provide a rotatable, front member102C extending from bottom frame member 101 which is slidably coupled tosupport member 102D, and from which the support member also rotatablypivots to provide support while still allowing the front members to beselectively folded or deployed. Additional specific exemplaryembodiments further provide that member 102C may have a shock or dampersystem.

FIG. 13 illustrates an alternative embodiment of a stroller 100.Specific exemplary embodiments provide the rear cargo area with afoldable child seat 210 that is selectively detachable from the rearcargo area. For embodiments which provide floor platform 101C, platform101C provides a floor upon which a child may step up to access thechair, or stand, as the case may be. For safety and otherconsiderations, specific exemplary embodiments of the stroller, platform101C is cropped to extend less than the full length of member 101B.

FIG. 14 illustrates an alternative embodiment of basket 127. Anotherspecific alternative embodiment provides a selectively foldable basket400 that is selectively mountable to handle 110, front frame member 102,rear frame member 103, support member 125, or rear cargo area platform101C_. Specific exemplary embodiments of basket 400 have one or moreelastic members 410A, 410B which mount to 430A & 430B respectively, andwhich are held in place by restraints 420A and 420B, which combinedcause basket 400 to snap into a more compact position when the basket isfolded. Base panels 430A, 430B pivot around hinge 440. Side Panels 450A,450B comprise the upper sides of basket 400. Members 460A, 460B providea potential surface in which to mount basket 400 to stroller 100 framemembers.

FIG. 15A illustrates a specific exemplary embodiment of a rear handlelock 130 of a stroller 100. A lock 130 provides, for example, amechanism consisting of rear frame member 103 (tube), pivot, lockingpins, shuttle, locking plates, spring, spring stop, lock actuator, andcable. A rear frame member 103 has slots cut into it to allow limitedtravel of the pins up and down parallel to the handle and along thecenter plane of rear frame member 103. The pivot is a metal pin, forexample, that facilitates rotational motion of the rear frame memberrelative to the locking plates. The locking pins provide the locking barfor restraining the rear frame member's rotation relative to the lockingplates. The shuttle may be a plastic part, for example, that slides upand down inside the handle tube and couples the pins so they slide upand down at the same time. The shuttle is constantly pushed upon(downward) by a spring pushing the shuttle and pins into a lockedposition. The shuttle has a cable attached to it in which a lockactuator on or near the handle pulls the cable and hence moves theshuttle and pins to an unlocked state. The unlocked state is a state inwhich the pins are now inside the circular track of the locking plateand the rear frame member 103 can now be rotated freely to a non-usestate (folded state). The locking plates may be mounted to lower framemember 101B and may be located on each side of the rear frame members103. The locking plates may employ tracks or slide-by-slide translationand locking pockets for the pins to travel in. The pins may be springloaded to lock into the locking pockets when the handle is rotated tothe appropriate angle to line up with the locking pockets. Lockingpockets may be designed for both a stowed (folded) state and erected(unfolded) state.

FIG. 15B illustrates lock 130 assembled.

FIG. 15C depicts lock 130 in an exploded view.

In reference now to FIGS. 16-29:

Telescopic Tubing with Wheel: A pair of tubes in which one tube 207 issmaller in circumference than the other 209, and in which the smallertube 207 houses at least one wheel 211, and in which the smaller tube207 contains a slot 213 for the wheel 211 to make contact with interiorof the larger tube 209. In general, the expandable stroller of thepresent invention comprises two mirror-imaged structural framesconnected to each other by cross members. As the cross members may beplaced in any suitable position, and since the structural frame membersare mirror images, the discussion of the structure of the presentinvention will focus on a single frame. One skilled in the art willrecognize that the description will apply equally to the mirrored frame.

Each pair of telescopic tubes are configured with at least one wheel (inthis case the wheels have ball bearings). The ball bearings ease themovement from the retracted to expanded configurations.

Telescopic Tubing Expansion with balls: A pair of tubes in which onetube 207 is smaller in circumference than the other 209, and in whichthe smaller tube 207 includes at least a set of channels or depressedinsets 219 on opposing upper/lower and/or left/right sides, and in whichat least two or more balls 215 is set within the channels/insets 219 ofthe smaller tube 207 and the interior surface 217 of the larger tube209, such that when the telescopic tubes move axially relative to eachother, movement of the tubes is eased by means of the balls. Theinterface 221 between the larger 209 and smaller 207 tubes (as well asthe tube ends), is preferably sealed in a way to prevent infiltration ofdirt and debris.

Telescopic Tubing Lock Mechanism: A pair of tubes in which one tube 207is smaller in circumference than the other 209, and in which the smallertube 207 slides relative to the larger tube 209, and in which thesmaller tube 207 is locked in a fixed position relative to the largertube 209 by means of a pin or rod 509 engaging into a tab or slot 513with a spring mechanism holding the pin/rod into a locked position, andin which releasing tension of the spring disengages the pin/rod from thetab/slot, thus allowing the tubes to slide relative to one another, andin which the design may embody two or more locking positions (tabsand/or slots). Releasing tension on the spring and pin/rod is achievedby pulling cables and/or a secondary mechanism which acts upon thespring. In one embodiment, the spring is located within the place for aspring 503 depicted in FIG. 25.

The telescopic tubes each have a locking mechanism, which is actuated atthe upper frame 202 of the stroller's front seat 204. To actuate thecables/locks, the user slides the secondary lock with their thumb andthen squeezes the actuation lever. The actuation lever pulls cables onboth the right and left sides to release the locks simultaneously. Thelock utilizes a spring that is predisposed to stay locked. The cablesrelease tension on the spring, allowing the lock to release.

The telescopic locking mechanism has three positions in which thepins/bars can lock into place. The initial position (FIG. 23, left), theintermediate expansion (FIG. 23, center), and the fully expandedposition (FIG. 23, right). Although our system has three positions, thedesign itself allows for a multitude of locking positions.

The locking mechanism can also be used in the other embodiment in whichthe extendable base is extended by telescopic actuation of the handle(FIGS. 3A-3D from the converted utility app). In this case, the actuatorfor the lock may be forward of the telescopic handle (or not a part ofit at all), but once the lock is released, telescoping the handle allowsthe tubes to slide relative to one another into their next lockedposition.

The illustrations of embodiments described herein are intended toprovide a general understanding of the structure of various embodiments,and they are not intended to serve as a complete description of all theelements and features of apparatus and systems that might make use ofthe structures described herein. Many other embodiments will be apparentto those of skill in the art upon reviewing the above description. Otherembodiments may be utilized and derived therefrom, such that structural,materials, and logical substitutions and changes may be made withoutdeparting from the scope of this disclosure. Figures are merelyrepresentational and may not be drawn to scale. Certain proportionsthereof may be exaggerated, while others may be minimized. Accordingly,the specification and drawings are to be regarded in an illustrativerather than a restrictive sense.

Such embodiments of the inventive subject matter may be referred toherein, individually and/or collectively, by the term “invention” merelyfor convenience and without intending to voluntarily limit the scope ofthis application to any single invention or inventive concept if morethan one is in fact disclosed. Thus, although specific embodiments havebeen illustrated and described herein, it should be appreciated that anyarrangement calculated to achieve the same purpose may be substitutedfor the specific embodiments shown. This disclosure is intended to coverany and all adaptations or variations of various embodiments.Combinations of the above embodiments, and other embodiments notspecifically described herein, will be apparent to those of skill in theart upon reviewing the above description.

The Abstract of the Disclosure is provided to comply with 37 C.F.R.§1.72(b), requiring an abstract that will allow the reader to quicklyascertain the nature of the technical disclosure. It is submitted withthe understanding that it will not be used to interpret or limit thescope or meaning of the claims. In addition, in the foregoing DetailedDescription, it can be seen that various features are grouped togetherin a single embodiment for the purpose of streamlining the disclosure.This method of disclosure is not to be interpreted as reflecting anintention that the claimed embodiments require more features than areexpressly recited in each claim. Rather, as the claims reflect,inventive subject matter lies in less than all features of a singledisclosed embodiment. Thus the following claims are hereby incorporatedinto the Detailed Description, with each claim standing on its own as aseparate embodiment.

The description has made reference to several exemplary embodiments. Itis understood, however, that the words that have been used are words ofdescription and illustration, rather than words of limitation. Changesmay be made within the purview of the appended claims, as presentlystated and as amended, without departing from the scope and spirit ofthe disclosure in all its aspects. Although description makes referenceto particular means, materials and embodiments, the disclosure is notintended to be limited to the particulars disclosed; rather, thedisclosure extends to all functionally equivalent technologies,structures, methods and uses such as are within the scope of theappended claims.

1. A stowable and deployable stroller for carrying one or morepassengers and transporting items, the stroller comprising: a frontframe member configured to support a seat; a rear frame member; aselectively extendable base member attached to the front frame memberand the rear frame member, said selectively extendable base memberfurther comprising: at least two pairs of tubes, wherein each pair oftubes comprises a first tube and a second tube, the first tube beingsmaller in circumference than the second tube, and the first tubefurther comprising at least one slot, said slot housing at least onewheel, said at least one wheel configured to make contact with thesecond tube, and said slot being located on a longitudinal exteriorsurface of the first tube; and a locking mechanism, wherein the lockingmechanism is configured to lock the first tube in a fixed positionrelative to the second tube when the locking mechanism is engaged, andthe locking mechanism allows for movement of at least one of the firsttube and the second tube with respect to the other of the first tube andthe second tube when the locking mechanism is disengaged, wherein thelocking mechanism further comprises at least one protruding element andat least one receiving element and is engaged when the at least oneprotruding element engages with a respective at least one receivingelement, wherein the locking mechanism further comprises a springlocated in a place for a spring, said spring configured to retain theprotruding element in a locked position, and in which releasing tensionon the spring disengages the protruding element from the receivingelement, thus allowing the tubes to slide in an axial direction relativeto one another, and wherein the locking mechanism further comprises oneor more actuators that act upon the spring to release tension.
 2. Astowable and deployable stroller for carrying one or more passengers andtransporting items, the stroller comprising: a front frame memberconfigured to support a seat; a rear frame member; a selectivelyextendable base member attached to the front frame member and the rearframe member, said selectively extendable base member furthercomprising: at least two pairs of tubes, wherein each pair of tubescomprises a first tube and a second tube, the first tube being smallerin circumference than the second tube and wherein one of the first tubeor the second tube includes one or more channels on each of opposingupper and lower sides of the tube, and in which at least two or moreballs are set within each of the one or more channels and configured toengage with a level interior surface of the other tube; and a lockingmechanism, wherein the locking mechanism is configured to lock the firsttube in a fixed position relative to the second tube when the lockingmechanism is engaged, and the locking mechanism allows for movement ofat least one of the first tube and the second tube with respect to theother of the first tube and the second tube when the locking mechanismis disengaged, wherein the locking mechanism further comprises at leastone protruding element and at least one receiving element and is engagedwhen the at least one protruding element engages with a respective atleast one receiving element, wherein the locking mechanism furthercomprises a spring located in a place for a spring, said springconfigured to hold the protruding element in a locked position, and inwhich releasing tension on the spring disengages the protruding elementfrom the receiving element, thus allowing the tubes to slide in an axialdirection relative to one another.
 3. The stroller of claim 2, whereinthe locking device further comprises one or more actuators which actupon the spring to release tension.
 4. The stroller of claim 1, whereinthe one or more actuators pull a flexible element which acts upon thespring to release tension.
 5. The stroller of claim 4, wherein theflexible element is routed through at least a portion of the selectivelyextendable base member.
 6. The stroller of claim 4, wherein the flexibleelement is routed through at least a portion of at least one of thefront frame member and the rear frame member.
 7. The stroller of claim6, wherein at least one of the one or more actuators is located on anupper portion of one of the front or rear frame member.
 8. The strollerof claim 7, wherein the at least one of the one or more actuators islocated at a position above at least a portion of the seat.
 9. Thestroller of claim 8, wherein the at least one of the one or moreactuators is located at the top portion of the front frame member. 10.The stroller of claim 8 wherein expansion of the stroller can beachieved by actuating the at least one of the one or more actuators onthe front frame member, followed by pulling the upper portion of thefront frame member and at least one of an upper portion of the rearframe member or a rear handle in opposite directions.
 11. The strollerof claim 1 wherein the stroller comprises two or more locking positionsdefined by the at least one receiving element.
 12. The stroller of claim1, wherein the at least one protruding element further comprises atleast one of a pin or a rod, and wherein the at least one receivingelement further comprises at least one of a slot or a tab.
 13. Astowable and deployable stroller for carrying one or more passengers andtransporting items, the stroller comprising: a front frame memberconfigured to support a seat; a rear frame member; a selectivelyextendable base member attached to the front frame member and the rearframe member, said selectively extendable base member furthercomprising: at least two pairs of tubes, wherein each pair of tubescomprises a first tube and a second tube, the first tube being smallerin circumference than the second tube and wherein one of the first tubeor the second tube includes one or more channels on each of opposingupper and lower sides of the tube, and in which at least two or moreballs are set within each of the one or more channels and configured toengage with a level interior surface of the other tube; and a lockingmechanism, wherein the locking mechanism is configured to lock the firsttube in a fixed position relative to the second tube when the lockingmechanism is engaged, and the locking mechanism allows for movement ofat least one of the first tube and the second tube with respect to theother of the first tube and the second tube when the locking mechanismis disengaged, wherein the locking mechanism further comprises at leastone protruding element and at least one receiving element and is engagedwhen the at least one protruding element engages with the respective atleast one receiving element, wherein the at least one receiving elementis housed against at least one inner wall of the second tube.
 14. Thestroller of claim 13, wherein the at least one protruding elementfurther comprises at least one of a pin or a rod, and wherein the atleast one receiving element further comprises at least one of a slot ora tab.
 15. The stroller of claim 13, wherein the at least one protrudingelement does not protrude through the entire wall of the second tube.16. The stroller of claim 13, wherein the stroller comprises two or morelocking positions defined by the at least one receiving element.
 17. Thestroller of claim 13, wherein the locking mechanism further comprises aspring located in a place for a spring, said spring configured to holdthe protruding element in a locked position, and in which releasingtension on the spring disengages the protruding element from thereceiving element, thus allowing the tubes to slide in an axialdirection relative to one another.
 18. The stroller of claim 13, whereinthe receiving element further comprises plates or inserts connected tothe second tube.
 19. The stroller of claim 13, wherein the at least onereceiving element and the second tube comprises a single piece ofmaterial.